(b Rome, 1578; d Rome, Feb. 1644). Italian painter, active mainly in Rome. He was one of the outstanding quadratura specialists of the period, his most famous work being the illusionistic setting for Guercino's celebrated Aurora fresco (1621–3) in the Casino of the Villa Ludovisi, Rome. Tassi also painted small landscapes in the manner of Bril and Elsheimer, and for centuries he was remembered mainly because he taught Claude, his significance as a decorative painter being forgotten.
Text Source: The Oxford Dictionary of Art and Artists (Oxford University Press)